diff options
| author | Jan Beulich <jbeulich@novell.com> | 2006-12-07 01:14:13 (GMT) |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 01:14:13 (GMT) |
| commit | 359ad0d4015a9ab39243f2ebc4eb07915bd618b2 (patch) | |
| tree | 90f05d8d9ab048029bfe1e451a012b4d5896aafe /include | |
| parent | eef5e0d185fc049bda11fa14ba286fbd357da896 (diff) | |
| download | linux-fsl-qoriq-359ad0d4015a9ab39243f2ebc4eb07915bd618b2.tar.xz | |
[PATCH] unwinder: more sanity checks in Dwarf2 unwinder
Tighten the requirements on both input to and output from the Dwarf2
unwinder.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-i386/unwind.h | 12 | ||||
| -rw-r--r-- | include/asm-x86_64/unwind.h | 8 |
2 files changed, 6 insertions, 14 deletions
diff --git a/include/asm-i386/unwind.h b/include/asm-i386/unwind.h index 601fc67..aa2c931 100644 --- a/include/asm-i386/unwind.h +++ b/include/asm-i386/unwind.h @@ -79,17 +79,13 @@ extern asmlinkage int arch_unwind_init_running(struct unwind_frame_info *, void *arg), void *arg); -static inline int arch_unw_user_mode(const struct unwind_frame_info *info) +static inline int arch_unw_user_mode(/*const*/ struct unwind_frame_info *info) { -#if 0 /* This can only work when selector register and EFLAGS saves/restores - are properly annotated (and tracked in UNW_REGISTER_INFO). */ - return user_mode_vm(&info->regs); -#else - return info->regs.eip < PAGE_OFFSET + return user_mode_vm(&info->regs) + || info->regs.eip < PAGE_OFFSET || (info->regs.eip >= __fix_to_virt(FIX_VDSO) - && info->regs.eip < __fix_to_virt(FIX_VDSO) + PAGE_SIZE) + && info->regs.eip < __fix_to_virt(FIX_VDSO) + PAGE_SIZE) || info->regs.esp < PAGE_OFFSET; -#endif } #else diff --git a/include/asm-x86_64/unwind.h b/include/asm-x86_64/unwind.h index 2e7ff10..2f6349e 100644 --- a/include/asm-x86_64/unwind.h +++ b/include/asm-x86_64/unwind.h @@ -87,14 +87,10 @@ extern int arch_unwind_init_running(struct unwind_frame_info *, static inline int arch_unw_user_mode(const struct unwind_frame_info *info) { -#if 0 /* This can only work when selector register saves/restores - are properly annotated (and tracked in UNW_REGISTER_INFO). */ - return user_mode(&info->regs); -#else - return (long)info->regs.rip >= 0 + return user_mode(&info->regs) + || (long)info->regs.rip >= 0 || (info->regs.rip >= VSYSCALL_START && info->regs.rip < VSYSCALL_END) || (long)info->regs.rsp >= 0; -#endif } #else |